<template>
  <div>
    <!--面包屑导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图-->
    <el-card>
      <!--添加角色按钮-->
      <el-row>
        <el-col>
          <el-button type="primary" @click="AddRoleDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>
      <!--角色列表-->
      <el-table :data="roleList" border stripe>
        <!--展开列-->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!--渲染一级权限-->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{
                  item1.authName
                }}</el-tag>
                <i class="el-icon-caret-right" />
              </el-col>
              <!--渲染二级和三级权限-->
              <el-col :span="19">
                <!--通过for循环嵌套渲染二级权限-->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right" />
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!--<pre>{{ scope.row }}</pre>-->
          </template>
        </el-table-column>
        <!--索引列-->
        <el-table-column type="index" label="#" />
        <el-table-column label="角色名称" prop="roleName" />
        <el-table-column label="角色描述" prop="roleDesc" />
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeRoleById(scope.row.id)"
              >删除</el-button
            >
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!--添加角色对话框-->
    <el-dialog
      title="添加角色"
      :visible.sync="AddRoleDialogVisible"
      width="40%"
      @close="addRoleDialogClosed"
    >
      <el-form
        :model="addRoleForm"
        ref="addRoleFormRef"
        :rules="addRoleFormRules"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName" />
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc" />
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="AddRoleDialogVisible = false">取消</el-button>
        <el-button type="primary" @click="addRoles">确定</el-button>
      </span>
    </el-dialog>
    <!--编辑角色对话框-->
    <el-dialog title="编辑角色" :visible.sync="editRoleDialogVisible" width="40%">
      <el-form
        :model="editRoleForm"
        ref="editRoleFormRef"
        :rules="editRoleFormRules"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRoleForm.roleName" />
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRoleForm.roleDesc" />
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRoleDialogVisible = false">取消</el-button>
        <el-button type="primary" @click="editRoles">确定</el-button>
      </span>
    </el-dialog>
    <!--分配权限的对话框-->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!--树形控件-->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      />
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: "Roles",
  data() {
    return {
      // 所有角色列表
      roleList: [],
      // 分配角色对话框
      setRightDialogVisible: false,
      // 所有权限的数据
      rightsList: [],
      // 树形控件的绑定对象
      treeProps: {
        label: "authName",
        children: "children",
      },
      // 默认选择节点 Id 值数组
      defKeys: [],
      // 添加用户对话框
      AddRoleDialogVisible: false,
      // 添加角色表单
      addRoleForm: {},
      // 添加角色表单验证
      addRoleFormRules: {
        roleName: [{ required: true, message: "请输入角色名称", trigger: "blur" }],
        roleDesc: [{ required: true, message: "请输入角色描述", trigger: "blur" }],
      },
      // 编辑用户信息
      editRoleDialogVisible: false,
      editRoleForm: {},
      editRoleFormRules: {
        roleName: [{ required: true, message: "请输入角色名称", trigger: "blur" }],
        roleDesc: [{ required: true, message: "请输入角色描述", trigger: "blur" }],
      },
      // 角色id
      roleId: 0,
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    // 获取角色列表数据
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败！");
      }
      this.roleList = res.data;
      // console.log(this.roleList);
    },
    // 添加角色
    addRoles() {
      this.$refs.addRoleFormRef.validate(async (valid) => {
        if (!valid) return;
        const { data: res } = await this.$http.post("roles", this.addRoleForm);
        if (res.meta.status !== 201) {
          this.$message.error("添加角色失败！");
        }
        this.$message.success("添加角色成功！");
        this.AddRoleDialogVisible = false;
        this.getRolesList();
      });
    },
    //添加角色对话框关闭(清空对话框数据)
    addRoleDialogClosed() {
      this.$refs.addRoleFormRef.resetFields();
    },

    // 编辑角色
    async showEditDialog(id) {
      const { data: res } = await this.$http.get("roles/" + id);
      if (res.meta.status !== 200) return this.$message.error("查询角色失败！");
      this.editRoleForm = res.data;
      //  console.log(res.data);
      this.editRoleDialogVisible = true;
    },
    editRoles() {
      this.$refs.editRoleFormRef.validate(async (valid) => {
        //  console.log(valid);
        // 表单校验失败
        if (!valid) return;
        const { data: res } = await this.$http.put("roles/" + this.editRoleForm.roleId, {
          roleName: this.editRoleForm.roleName,
          roleDesc: this.editRoleForm.roleDesc,
        });
        if (res.meta.status !== 200) {
          this.$message.error("更新角色失败！");
        }
        this.$message.success("更新角色成功！");
        this.editRoleDialogVisible = false;
        this.getRolesList();
      });
    },

    // 删除角色
    async removeRoleById(id) {
      const confirmRes = await this.$confirm(
        "此操作将用永久删除该角色，是否继续？",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmRes !== "confirm") {
        return this.$message.info("已取消删除");
      }
      const { data: res } = await this.$http.delete("roles/" + id);
      if (res.meta.status !== 200) return this.$message.error("删除角色失败！");
      this.$message.success("删除用户成功！");
      this.getRolesList();
    },
    // 根据Id 删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否移除
      const confirmRes = await this.$confirm(
        "此操作将用永久删除该角色，是否继续？",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmRes !== "confirm") {
        return this.$message.info("已取消删除!");
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`);
      if (res.meta.status !== 200) return this.$message.error("删除权限失败！");
      this.$message.success("删除权限成功！");

      //this.getRolesList()
      role.children = res.data;
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id;
      // 获取所有权限的数据
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限数据失败!");
      }
      // 把获取到权限数据保存到 data 中
      this.rightsList = res.data;
      // console.log(this.rightsList);
      // 递归获取三级节点的Id
      this.getLeafKeys(role, this.defKeys);
      this.setRightDialogVisible = true;
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保持到 defKeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前 node 节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach((item) => this.getLeafKeys(item, arr));
    },
    // 监听分配权限对话框关闭事件
    setRightDialogClosed() {
      this.defKeys = [];
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ];
      // console.log(keys);
      const idStr = keys.join(",");
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, {
        rids: idStr,
      });
      if (res.meta.status !== 200) {
        return this.$message.error("分配权限失败!");
      }
      this.$message.success("分配权限成功！");
      this.getRolesList();
      this.setRightDialogVisible = false;
    },
  },
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
